| Zip Code | Primary City | Secondary City | | 20170 | Herndon | | | 20171 | Herndon | Oak Hill | | 20172 | Herndon | | | 20190 | Reston | Herndon | | 20191 | Reston | Herndon | | 20192 | Herndon | Herndon, Hundon, U S Geological Survey, Reston | | 20193 | Reston | Herndon, Hundon, Sallie Mae, | | 20194 | Reston | Herndon | | 20195 | Reston | Herndon | | 20196 | Reston | Herndon, Hundon, Sprint, | | 20598 | Dhs | Herndon, Dept Hs, Alexandria, Arlington, Fairfax, Falls Church, Lorton, Mclean, Reston, Springfield, Sterling, Mc Lean | | 22092 | Herndon | U S Geological Survey | | 22095 | Herndon | Herndon, Business Reply Mail, Reston | | 22096 | Reston | Herndon, Sprint, |
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